The LNK364PN from Power Integrations is an energy-efficient low-power offline switcher IC in the LinkSwitch™-XT family. It combines the high-voltage switching element, control circuitry, and protection functions required for compact AC/DC power supplies with a very low external component count. Typical applications include chargers, appliance auxiliary supplies, industrial systems, and metering equipment.
The device integrates a 700V high-voltage power MOSFET, eliminating the need for a separate external high-voltage switching transistor. Power Integrations specifies a 700V breakdown-voltage rating for the exact LNK364PN device.
The LinkSwitch-XT architecture uses simple ON/OFF control, eliminating the conventional loop-compensation circuitry required by many PWM controllers. A self-biased supply derives startup and operating power directly from the DRAIN pin, allowing designs to eliminate a transformer bias winding and its associated components.
Integrated frequency jittering spreads switching-frequency energy to help reduce EMI, while the high-bandwidth control architecture provides fast startup and good transient-load response.
For fault protection, the device incorporates fully integrated auto-restart. During output short-circuit or open-loop conditions, Power Integrations states that delivered output power is reduced by approximately 95%, helping limit thermal stress during persistent faults.
The device also includes accurate hysteretic thermal-shutdown protection with automatic recovery, improving system reliability when abnormal temperatures occur.
LNK364PN is intended for universal-input offline power-supply applications. Power Integrations lists applications including mobile and cordless-phone chargers, PDAs, digital cameras, portable audio equipment, shavers, appliances, industrial systems, and metering power supplies.
For the exact LNK364PN, Power Integrations specifies a maximum output-power capability of 9W in an open-frame 230V design. Actual available power depends on converter design, input range, transformer, efficiency, and thermal conditions.
The exact LNK364PN uses a DIP-8B through-hole package and is specified for operation from -40°C to +150°C. Power Integrations currently lists it as an active product with a newer version available, making it suitable for existing designs while newer LinkSwitch-XT2 devices can be considered for new projects.
Key Specifications:
- Brand: Power Integrations / PI
- Part Number: LNK364PN
- Family: LinkSwitch™-XT
- Product Type: Low-Power Offline Switcher IC
- Typical Topology: Offline Flyback Power Supply
- Integrated Power Switch: Yes
- MOSFET Breakdown Voltage: 700V
- Maximum Output Power: 9W at 230V, Open Frame
- Control Scheme: ON/OFF Control
- Traditional Loop Compensation: Not Required
- Self-Biased Supply: Yes
- Bias Winding Elimination: Supported
- Frequency Jittering: Yes
- Auto-Restart: Yes
- Short-Circuit Protection: Yes
- Open-Loop Protection: Yes
- Fault Power Reduction: Approx. 95%
- Thermal Shutdown: Yes
- Thermal Response: Hysteretic
- Automatic Thermal Recovery: Yes
- Universal-Input Applications: Supported
- High-Voltage Startup Supply: Integrated
- Applications: Chargers, Appliances, Industrial Supplies, Metering
- Package: DIP-8B
- Mounting Type: Through-Hole
- Operating Temperature: -40°C to +150°C
- MSL for PN Through-Hole Version: N/A
- Product Status: Active
- Manufacturer Note: Newer Version Available.
Reviews
There are no reviews yet.